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  #1  
Old 12-04-2022, 05:06 PM
MarkCFI MarkCFI is online now
 
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Default Mystery (to me) part

I pulled the cowl off my RV-4 to do an oil change. When I pulled the lower cowl this small piece of thin stainless fell out.

I didn’t build this plane so I was hoping someone that has a little more experience might be able to identify it.
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  #2  
Old 12-04-2022, 05:23 PM
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Default

Heat shield.
Missing the 2 stainless steel band clamps.
Would look for marks on engine mount.

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  #3  
Old 12-04-2022, 05:34 PM
David Paule David Paule is offline
 
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I agree with Bruce. Also look for places where that size heat shield makes sense.

Dave
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  #4  
Old 12-04-2022, 06:27 PM
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hgerhardt hgerhardt is online now
 
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I’d bet the two hose clamps are still on one of the exhaust tubes holding the broken tabs of that shield.
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  #5  
Old 12-04-2022, 08:20 PM
MarkCFI MarkCFI is online now
 
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Thanks all……..

I’ll be back up at the Hangar on Wednesday and will see if I can find the location.

I had no idea what it was…….
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  #6  
Old 12-04-2022, 08:26 PM
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Take a really close look at the other parts in and around the exhaust pipes and engine mounts. Steel heat shrouds shouldn't stress out from most vibrations and crack like that.
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  #7  
Old 12-05-2022, 09:28 AM
MarkCFI MarkCFI is online now
 
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Well, my friend went up and took a quick look and he thought I might have a crack in one of the exhausts. Looks like it’s kind of near a couple of bands.

I’ll be heading up again Wednesday to take a closer look and see if that is actually a crack but now I’m a little suspicious.
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